SILRES® BS 1802 CN is recommended as a waterproofing concrete admixture.
Processing of undiluted product as a water resisting admixture according to EN 934-2:2009 Tab. 9:
The recommended dosage range is 0.2 % to 1.0 % with respect to the cement content in the concrete. A significant
reduction in water uptake can already be achieved at this low concentrations. Best results for inhibiting ASR were obtained at 0.5 %, however final dosage needs to be adjusted depending on the cement quality and formulation
SILRES® BS 1802 CN is added either simultaneously with or immediately after the mixing water – it should never be added along with other additives.
We recommend testing compatibility with other concrete admixtures separately. A longer mixing time will thoroughly distribute the product within the overall system, which in turn will make it highly effective.
An initial test according to DIN Technical Report 100, section 9.5, (alternative: EN 206-1 and EN 1045-2) must be conducted for each new concrete composition. Finer adjustment of the fresh and set concrete properties by, for instance, varying the binder content pursuant to EN 206-1 and EN 1045-2 is recommended on a case-by-case basis. The concrete may harden more slowly during the first days in isolated cases.
Processing as a Concrete Admixture (Water Resisting Admixture) in non-loadbearing concrete goods.
When used in concrete goods or similar concrete products according to EN 1338, 1339 or EN 1340, an initial-type test (cf. section 6.2 of the respective standard) is recommended. For that application the use of diluted SILRES® BS 1802 CN is permitted.
The recommended admixture range of a 1 : 4 dilution of SILRES® BS 1802 CN is 1.0 % to 5.0 % of the cement content. A significant reduction in water uptake can already be achieved at a concentration of 1.0 % of the cement.
SILRES® BS 1802 CN is added either simultaneously with or immediately after the mixing water – it should never be added along with other additives. To keep a constant w/c ratio, the total mixing water is reduced by amount required earlier for dilution. We recommend testing compatibility with other concrete admixtures separately. A longer mixing time will thoroughly distribute the product within the overall system, which in turn will make it highly effective.
